249457065 has 64 divisors (see below), whose sum is σ = 496564992. Its totient is φ = 105062400.

The previous prime is 249457063. The next prime is 249457067. The reversal of 249457065 is 560754942.

It is an interprime number because it is at equal distance from previous prime (249457063) and next prime (249457067).

It is not a de Polignac number, because 249457065 - 2¹ = 249457063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (249457063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33045 + ... + 39885.

It is an arithmetic number, because the mean of its divisors is an integer number (7758828).

Almost surely, 2^249457065 is an apocalyptic number.

It is an amenable number.

249457065 is a deficient number, since it is larger than the sum of its proper divisors (247107927).

249457065 is a wasteful number, since it uses less digits than its factorization.

249457065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6890.

The product of its (nonzero) digits is 302400, while the sum is 42.

The square root of 249457065 is about 15794.2098567798. The cubic root of 249457065 is about 629.5041575939.

The spelling of 249457065 in words is "two hundred forty-nine million, four hundred fifty-seven thousand, sixty-five".